Seems he do not understand what is 100k TPS.
100,000 transactions * 260 bytes * 60 seconds * 60 minutes * 24 hours = 2 246 400 000 000 bytes per day = 2.25 TB / day
In all honesty, that's not a particular challenge, but you'll be able to do it more efficiently than your competition if you have some of these scattered around the world:
but you probably won't be allowed to operate it for long without hooking up to one of these:
Actually, the real meat of the problem is related to network stuff which is harder to explain pictorially.